<TITLE>cosh</TITLE>
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<h3>COSH(3)             Linux Programmer's Manual             COSH(3)
</h3>

<h3>NAME
</h3>       cosh - hyperbolic cosine function

<h3>SYNOPSIS
</h3>       #include &lt;math.h&gt;

       double cosh(double x);

<h3>DESCRIPTION
</h3>       The  cosh()  function  returns the hyperbolic cosine of x,
       which is defined mathematically as exp(x) + exp(-x) / 2.

<h3>CONFORMING TO
</h3>       SVID 3, POSIX, BSD 4.3, ISO 9899

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<h3>SEE ALSO
</h3><p>
<a href=acosh.htm>acosh</a>, 
<a href=asinh.htm>asinh</a>, 
<a href=atanh.htm>atanh</a>, 
<a href=sinh.htm>sinh</a>, 
<a href=tanh.htm>tanh</a>, 
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                          June 13, 1993                         1


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